made the first sample of abstract class 'Piece'

src/pieces/Piece.java

+package pieces;
+
+/**
+ * Piece is an abstract class which means that it cannot be instantiated
+ *Rook, Knight, Queen, King and Pawn are subclasses of Piece
+ */
+public abstract class Piece {
+private String pieceId;
+private String pieceColor;
+private String imagePath;
+
+
+    public void setImage(String image) {
+        imagePath = image;
+    }
+
+    public void setPieceColor(String pieceColor) {
+        this.pieceColor = pieceColor;
+    }
+
+    public void setPieceId(String pieceId) {
+        this.pieceId = pieceId;
+    }
+
+    public String getPieceColor() {
+        return pieceColor;
+    }
+
+    public String getPieceId() {
+        return pieceId;
+    }
+
+    public String getImage() {
+        return imagePath;
+    }
+}